# Calendar Busy Sync vs LockCal

The clearest difference is update cadence: LockCal at monthly against Calendar Busy Sync's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Calendar Busy Sync ships an update every 2 months, LockCal monthly. The most recent releases landed on October 28, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Calendar Busy Sync | LockCal |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Size | 10 MB | 4 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Sous Chef Studio, Inc.](https://appshunter.io/developer/1768173412) | [Vladimir Popov](https://appshunter.io/developer/6791445377) |

## What reviewers say

### Calendar Busy Sync

[App page](https://appshunter.io/ios/app/calendar-busy-sync/id6762634278)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### LockCal

[App page](https://appshunter.io/ios/app/lockcal/id6794340782)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Calendar Busy Sync free?

Calendar Busy Sync is free to download, with no in-app purchases.

### Is LockCal free?

LockCal is free to download, with no in-app purchases.

### Do Calendar Busy Sync or LockCal have ads?

Neither Calendar Busy Sync nor LockCal shows ads.

### Which is updated more often, Calendar Busy Sync or LockCal?

Calendar Busy Sync ships an update every 2 months, and LockCal monthly. Most recently, Calendar Busy Sync was updated on October 28, 2026 and LockCal on October 25, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*